/**
 * If the option includes a `dataZoom` array (from ZoomToggle's transform),
 * lift any slider entries above the legend row so they don't overlap.
 * Returns `null` when there is no `dataZoom` — caller skips the layout
 * adjustment entirely.
 *
 * Shared between bar, histogram, and timeseries — every widget with a
 * horizontal x-axis dataZoom slider needs the same offset when a legend
 * is rendered below the plot.
 */
export declare function positionDataZoomForLegend(dataZoom: unknown, hasLegend: boolean): unknown[] | null;